#include<bits/stdc++.h>
using namespace std;
#define N 202
#define pii pair<int,int>
#define pip pair<int,pair<int,int> >
#define ppp pair< pair<int,int> , pair<int,int> >

pii NE[6]={{-2,-1},{-2,1},{0,2},{2,1},{2,-1},{0,-2}};

vector<vector<int> > d(N,vector<int> (N,INT_MAX));
pair<int,int> b[N][N];
int n;

string direction(int x,int y){
    x=-x;
    y=-y;
    if(x==-2 && y==-1)
        return "UL";
    else if(x==-2 && y==1)
        return "UR";
    else if(x==0 && y==2)
        return "R";
    else if(x==2 && y==1)
        return "LR";
    else if(x==2 && y==-1)
        return "LL";
    else
        return "L";
    return "0";
}
vector<string> m;

bool compare(ppp a,ppp b){
    if(a.first.first==b.first.first)
        return a.first.second > b.first.second;
    else
        return a.first.first > b.first.first;
}
void dist(int x,int y){
    int time=0;
    priority_queue<ppp, vector<ppp>, std::function<bool(ppp,ppp)> > h(compare);
    d[x][y]=0;
    h.push(make_pair(make_pair(0,time++),make_pair(x,y)));
    while(!h.empty()){
        pii z=h.top().second;
        int x1=z.first;
        int y1=z.second;
        h.pop();
        int i;
        for(i=0;i<6;i++){
            int x2=x1+NE[i].first;
            int y2=y1+NE[i].second;
            if(x2>=0 && x2<n && y2>=0 && y2<n){
                if(d[x2][y2]>1+d[x1][y1]){
                    d[x2][y2]=1+d[x1][y1];
                    h.push(make_pair(make_pair(d[x2][y2],time++),make_pair(x2,y2)));
                    b[x2][y2]=make_pair(x1,y1);
                }
            }
        }
    }
}

void print(int p,int q){
    int c=d[p][q];
    while(c--){
        int i=p,j=q;
        p=b[i][j].first;
        q=b[i][j].second;
        m.push_back(direction(p-i,q-j));
    }
}
int main(){
    int i,j,x1,y1,x2,y2;
    cin>>n>>x1>>y1>>x2>>y2;
    dist(x1,y1);
    if(d[x2][y2]!=INT_MAX){
        /*for(i=0;i<n;i++){
            for(j=0;j<n;j++)
                cout<<"("<<b[i][j].first<<" "<<b[i][j].second<<")    ";
            cout<<endl;
        }*/

        cout<<d[x2][y2]<<endl;
        print(x2,y2);
            for(i=m.size()-1;i>=0;i--)
            cout<<m[i]<<" ";
    }else
        cout<<"Impossible\n";
}